Claim 5 To form a metal panel in which a filing member is to be filled between a front plate and a rear plate which are made of a colored steel sheet, a method of forming a continuous metal panel comprising: continuously forming said front plate and rear plate having a certain width, in a lengthwise direction; forming caulking grooves having a narrow width to be in equal intervals in a lengthwise direction to said front plate; forming a connection groove portion and a connection projection portion respectively by bending upper and bottom portions of said front and rear plates; installing a cover so that said caulking grooves may be sealed with an outside; stiffening in a manner to fill a filing member between said front and rear plates; and loading said panel by cutting into a necessary length for use Claim 6 The continuous metal panel as claimed in claim 5, produced by use of an insulator in which a filing member is selected from a polyurethane foam (PU), a glass wool bo...